Rev. 5 - 08/09
Copyright© 1998-2009, Alpha Communications®, All Rights Reserved
42 Central Drive • Farmingdale NY 11735-1202 • Phone (631) 777-5500 • Fax (631) 777-5599
TOLL-FREE 1-800-666-4800 • Web: www.AlphaCommunications.com • Email: email@example.com
ARCHITECTS' AND ENGINEERS'
The system Power Supply shall be Alpha Communi-
cations®/Ring PSDC24 series or approved equiva-
lent. Unit shall be used with the PRO700 series inter-
com system. Unit shall provide 24VDC power and
shall operate on 50/60 Hz. Power supply shall be
provided with an AC cord and grounded plug. Trans-
former/power supply shall be U.L. listed. Contractor
shall provide a power supply of sufficient amperage,
depending upon the total number of master and/or
remote stations in the system.
Contractor shall observe all local and national electri-
cal and building codes.
Power Supply Units
The PSDC24 series 24VDC transformer power
supplies are specifically designed to provide
power for the PRO700 series intercom system.
One (1) power supply is required for each sys-
tem, and there is no central exchange required.
There are three (3) models with varying outputs,
depending upon the total number of masters
and/or remotes on each system.
• 24VDC, 50 / 60 Hz Output
• Heavy duty construction
• Three (3) models available
(U.L.) Listed (when used in U.S.A.)
Heavy duty steel case finish, with mount-
24VDC, 50 / 60 Hz,
12 Amps (Model# PSDC24-12)
5 Amps (Model# PSDC24-5)
2.5 Amps (Model# PSDC24-12.5)
Total No. of Masters and remotes
40 Maximum (1- Model# PSDC24-12)
20 Maximum (1- Model# PSDC24-5)
10 Maximum (2- Model# PSDC24-1.3)
5 Maximum (1- Model# PSDC24-1.3)
120VAC, 50 / 60 Hz, single phase
NOTE: All models except PSDC24-1.3
will also work with 220VAC, 50 / 60 Hz,
single phase (requires a small field
modification by customer).
AC cord with grounded plug